Comparison of muscle synergies for running between different foot strike patterns

Koji Nishida, Shota Hagio, Benio Kibushi, Toshio Moritani, Motoki Kouzaki

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

It is well known that humans run with a fore-foot strike (FFS), a mid-foot strike (MFS) or a rear-foot strike (RFS). A modular neural control mechanism of human walking and running has been discussed in terms of muscle synergies. However, the neural control mechanisms for different foot strike patterns during running have been overlooked even though kinetic and kinematic differences between different foot strike patterns have been reported. Thus, we examined the differences in the neural control mechanisms of human running between FFS and RFS by comparing the muscle synergies extracted from each foot strike pattern during running. Muscle synergies were extracted using non-negative matrix factorization with electromyogram activity recorded bilaterally from 12 limb and trunk muscles in ten male subjects during FFS and RFS running at different speeds (5-15 km/h). Six muscle synergies were extracted from all conditions, and each synergy had a specific function and a single main peak of activity in a cycle. The six muscle synergies were similar between FFS and RFS as well as across subjects and speeds. However, some muscle weightings showed significant differences between FFS and RFS, especially the weightings of the tibialis anterior of the landing leg in synergies activated just before touchdown. The activation patterns of the synergies were also different for each foot strike pattern in terms of the timing, duration, and magnitude of the main peak of activity. These results suggest that the central nervous system controls running by sending a sequence of signals to six muscle synergies. Furthermore, a change in the foot strike pattern is accomplished by modulating the timing, duration and magnitude of the muscle synergy activity and by selectively activating other muscle synergies or subsets of the muscle synergies.

Original languageEnglish
Article numbere0171535
JournalPloS one
Volume12
Issue number2
DOIs
Publication statusPublished - 2017 Feb 1
Externally publishedYes

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Running
Muscle
Foot
Muscles
muscles
Neurology
Protein Sorting Signals
Landing
Factorization
electromyography
duration
Kinematics
Chemical activation
Electromyography
signal peptide
limbs (animal)
kinematics
Biomechanical Phenomena
walking
Walking

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

Cite this

Comparison of muscle synergies for running between different foot strike patterns. / Nishida, Koji; Hagio, Shota; Kibushi, Benio; Moritani, Toshio; Kouzaki, Motoki.

In: PloS one, Vol. 12, No. 2, e0171535, 01.02.2017.

Research output: Contribution to journalArticle

Nishida, Koji ; Hagio, Shota ; Kibushi, Benio ; Moritani, Toshio ; Kouzaki, Motoki. / Comparison of muscle synergies for running between different foot strike patterns. In: PloS one. 2017 ; Vol. 12, No. 2.
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